Interlocking hinge.



F'. C. ZOVEEL. INTSBLOKING HINGE. APPLIOATION FILED 1320.4, my.

Patented 00E. i3, 1914.

,TIQTITLWH f hinge pintle is removed.'

\,on the outside,

v door hinge pivoted .sulting in cases of ,fire opening inwardly have 'tongues 4, f1, out of one leaf,

UNITED sTATEs PATENT oEEIcE-I.

FREDERICK C. ZOBEL, 0F YORK, N. Y. y

To all whom t may concern:

Be it known that l, FREDERICK C. ZoeEL, a citizen of the United States of America, residing at New York city, State and county of New York, have invented certain new and useful Improvements in Interlocking Hinges, of which the following is a specific'ation. y

My invention relates to door hinges and com rises an improved form of interlocking inge which prevents the removal from the doorway of a closed door even 1f the Recent instances of illustrated in the accompanying sheet of drawing in which- Figure l is a view of the hinge with the leaves opened. Fig. 2 isa cross section of the hinge closed, taken on lines 2-2 of Fig. Fig. 3 is a cross section on line 3-3 of Fig. l. Fig. 4 shows a lmodification and Fig. 5 is a cross'section on lines 45 5 of Fig 4. f

`Throughout the drawings like reference characters indicate like parts.

l 1 and 2 are the leaves of an ordinary together by pintle 3. The usual countersunk screw holes for use in fastening one hinge leaf tothe door and the other leaf lto the jamb are indicated at 9, 9. The leaves of such hinges at the present time are oftenmade by stamping In such opera.

them out of strips of metal.

tionit is a simple matter to also stamp .up and to cut out openings, 5, 5 from the' other leaf with which the tongues e, 4 mayengage when the Specification of Letters Patent. .Application led December 4, 1911.

'the lpintle of the hin INTERLCKING HINGE.

Patented Oct. 13, 1914. Serial No. 863,739.

door is closed. y

Such engagement is shown in Figs. 2 and 3.

The tongues 4, 4,-, are preferably cut so that their edges 7 and 8 are curved to ares whose 'common center is the axis This does not interfere with the engagement and disengagement of the 'two leaves when the hinge is opened or shut by the rotation of one leaf with reference to the ether-on hooked projection whichfur'ther interferes with any attempt to remove the7 door by taking-out thehinge pintle, and prevents the separation of the leaves by w es or other instruments designed to disengage the projections in that way.

In the construction shown in Figs. 4 and 5, each leaf has one or more stamped up tongues 5, 5, formed on it, each tongue. engaging the slot 6,A formed by stampinup the opposite tongue in the other leaf. his produces greater security by the double engagement, and also renders it possible to employ one and the same die in stamping both leaves, the two leaves being duplicates for the hinge.

The advantages of its cheapness, and the security afforded thereby. The 'projections being integral with the hinge leaves cannot be loosened therefrom. y

Hafingdescribed my invention, I claiml. i integral with one leaf and openings to recelve said t adapted projections formed in the other leaf, said projections being' hookshaped.

2. A. door hinge composed of twoleaves each of which is a duplicate of the other, and' has an inwardly `projecting tongue formed by stamping out and bending wardly a portion of the hinge butt, whereby, when the hinge is closed the tongue on each leaf will enter the-recess formed by stamping up the tongue on the other leaf.'

FREDERICK o. z'oBEL. Witnesses:

l vW. BERNzD VAL-rss,

GEo.- VAUSE.

e, but it produces a4 door hinge having projections formed l of the pintle 3.

, turned end for end before assembling them my invention comprise l 

